کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7724755 | 1497833 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical performance and stability of La0·5Sr0·5Fe0·9Nb0·1O3-δ symmetric electrode for solid oxide fuel cells
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Electrochemical performance and stability of La0·5Sr0·5Fe0·9Nb0·1O3-δ symmetric electrode for solid oxide fuel cells Electrochemical performance and stability of La0·5Sr0·5Fe0·9Nb0·1O3-δ symmetric electrode for solid oxide fuel cells](/preview/png/7724755.png)
چکیده انگلیسی
Symmetric solid oxide fuel cells (SSOFCs) based on the Co-free La0·5Sr0·5Fe0·9Nb0·1O3-δ (LSFNb) perovskite oxide are prepared by the sol-gel method. The structural stability and catalytic activity of LSFNb as an electrode for both the hydrogen oxidation reaction and oxygen reduction reaction are studied. We show that Nb substitution in La0·5Sr0·5FeO3-δ greatly improves its chemical and phase stability under reducing atmosphere. At 800â¯Â°C, the area specific polarization resistances (ASRp) of La0·5Sr0·5Fe0·9Nb0·1O3-δ symmetric cells are as low as 0.06 and 0.24â¯Î©â¯cm2 in air and wet H2 (3% H2O), respectively. LSFNb based electrolyte-supported SSOFCs deliver peak power densities of 1000â¯mWâ¯cm-2 at 850â¯Â°C in wet H2/air. In addition to high performance, the symmetric cell shows stable power output under load (measured for 140â¯h at a current density of 520â¯mAâ¯cmâ2, 800â¯Â°C) under air/humidified H2 operation, indicating that LSFNb may be a particularly promising new symmetric electrode material for solid oxide fuel cells.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 399, 30 September 2018, Pages 398-405
Journal: Journal of Power Sources - Volume 399, 30 September 2018, Pages 398-405
نویسندگان
Liuzhen Bian, Chuancheng Duan, Lijun Wang, Liangzhu Zhu, Ryan O'Hayre, Kuo-Chih Chou,